search for: ntsettimerresolut

...that may come down to set the RTC's REG_A hundreds of times every second but with the same rate(976.562us(1024HZ)), it is so abnormal to me to see such behavior. 3 OS I have tried to find why the win7 setted RTC's regA so frequently. finally got the result, all that comes from a function: NtSetTimerResolution --> 0x70,0x71 when I attached windbg into the guest OS, I also found the source, they are all called from a upper system call that comes from JVM(Java Virtual Machine). 4 JVM I don't know why JVM calls NtSetTimerResolution to set the same RTC's rate down (976.562us(1024HZ)) so freque...